71715973 has 4 divisors (see below), whose sum is σ = 81961120. Its totient is φ = 61470828.

The previous prime is 71715949. The next prime is 71715991. The reversal of 71715973 is 37951717.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71715973 - 2⁹ = 71715461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71715923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5122563 + ... + 5122576.

It is an arithmetic number, because the mean of its divisors is an integer number (20490280).

Almost surely, 2^71715973 is an apocalyptic number.

It is an amenable number.

71715973 is a deficient number, since it is larger than the sum of its proper divisors (10245147).

71715973 is a wasteful number, since it uses less digits than its factorization.

71715973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10245146.

The product of its digits is 46305, while the sum is 40.

The square root of 71715973 is about 8468.5283845542. The cubic root of 71715973 is about 415.4690067016.

The spelling of 71715973 in words is "seventy-one million, seven hundred fifteen thousand, nine hundred seventy-three".